This Chinese video seems to show interiors of the Potala including statues of previous Dalai Lamas, some of their Parinirvana stupas and even an apparently favorable photo of HH 14th Dalai Lama. Completely in Chinese. The emphasis here seems to be in large part the Chinese influence on Tibetan history.

A video of the Kalachakra mandala room in the Potala. The video doesn't show much. But I was surprised to find this a few months ago. Since then, it turns out that there are more videos of the interior of the Potala Palace than ever suspected.